What one place would you never want to return to?

The one place that I am happy never to see again, is a place I lived when I had my first child. I lived in a flat and it was in an extremely rough area. I lived there for about a year I think and although I made friends they were the wrong kind of friends and I could not get away from them, I ended up in some bad situations and eventually had to move really far away to get away from them.